convert form id to payment method string with validation

src/HavenoClient.test.ts

@@ -1040,8 +1040,8 @@ test("Can get payment accounts (CI)", async () => {
 // TODO: FieldId represented as number
 test("Can validate payment account forms (CI, sanity check)", async () => {
 
-  // supported payment methods
-  const expectedPaymentMethods = ["BLOCK_CHAINS", "REVOLUT", "SEPA", "SEPA_INSTANT", "TRANSFERWISE", "ZELLE", "SWIFT", "F2F", "STRIKE", "MONEY_GRAM", "FASTER_PAYMENTS", "UPHOLD", "PAXUM", "PAY_BY_MAIL"];
+  // expected payment methods
+  const expectedPaymentMethods = Object.keys(PaymentAccountForm.FormId);
 
   // get payment methods
   const paymentMethods = await user1.getPaymentMethods();
@@ -1097,7 +1097,7 @@ test("Can validate payment account forms (CI, sanity check)", async () => {
 test("Can create fiat payment accounts (CI)", async () => {
 
   // get payment account form
-  const paymentMethodId = 'REVOLUT';
+  const paymentMethodId = HavenoUtils.getPaymentMethodId(PaymentAccountForm.FormId.REVOLUT);
   const accountForm = await user1.getPaymentAccountForm(paymentMethodId);
 
   // edit form
@@ -3296,8 +3296,8 @@ function getCryptoAddress(currencyCode: string): string|undefined {
   }
 }
 
-async function createPaymentAccount(trader: HavenoClient, assetCodes: string, paymentMethodId?: string) {
-  if (!paymentMethodId) paymentMethodId = isCrypto(assetCodes!) ? "block_chains" : "revolut";
+async function createPaymentAccount(trader: HavenoClient, assetCodes: string, paymentMethodId?: string | PaymentAccountForm.FormId) {
+  if (!paymentMethodId) paymentMethodId = isCrypto(assetCodes!) ? PaymentAccountForm.FormId.BLOCK_CHAINS : PaymentAccountForm.FormId.REVOLUT;
   const accountForm = await trader.getPaymentAccountForm(paymentMethodId);
   for (const field of accountForm.getFieldsList()) field.setValue(getValidFormInput(accountForm, field.getId()));
   HavenoUtils.setFormValue(PaymentAccountFormField.FieldId.TRADE_CURRENCIES, assetCodes, accountForm);

src/HavenoClient.ts

@@ -860,11 +860,12 @@ export default class HavenoClient {
   /**
    * Get a form for the given payment method to complete and create a new payment account.
    * 
-   * @param {string} paymentMethodId - the id of the payment method
+   * @param {string | PaymentAccountForm.FormId} paymentMethodId - the id of the payment method
    * @return {PaymentAccountForm} the payment account form
    */
-  async getPaymentAccountForm(paymentMethodId: string): Promise<PaymentAccountForm> {
+  async getPaymentAccountForm(paymentMethodId: string | PaymentAccountForm.FormId): Promise<PaymentAccountForm> {
     try {
+      paymentMethodId = HavenoUtils.getPaymentMethodId(paymentMethodId); // validate and normalize
       return (await this._paymentAccountsClient.getPaymentAccountForm(new GetPaymentAccountFormRequest().setPaymentMethodId(paymentMethodId), {password: this._password})).getPaymentAccountForm()!;
     } catch (e: any) {
       throw new HavenoError(e.message, e.code);

src/utils/HavenoUtils.ts

@@ -74,53 +74,6 @@ export default class HavenoUtils {
     });
   }
 
-  /**
-   * Stringify a payment account form.
-   * 
-   * @param form - form to stringify
-   * @return {string} the stringified form
-   */
-  static formToString(form: PaymentAccountForm): string {
-    let str = "";
-    for (const field of form.getFieldsList()) {
-      str += field.getId() + ": " + this.getFormValue(form, field.getId()) + "\n";
-    }
-    return str.trim();
-  }
-  
-  /**
-   * Get a form field value.
-   * 
-   * @param {PaymentAccountForm} form - form to get the field value from
-   * @param {PaymentAccountFormField.FieldId} fieldId - id of the field to get the value from
-   * @return {string} the form field value
-   */
-  // TODO: attach getter and setter to PaymentAccountForm prototype in typescript?
-  static getFormValue(form: PaymentAccountForm, fieldId: PaymentAccountFormField.FieldId): string {
-    for (const field of form.getFieldsList()) {
-      if (field.getId() === fieldId) return field.getValue();
-    }
-    throw new Error("PaymentAccountForm does not have field " + fieldId);
-  }
-  
-  /**
-   * Set a form field value.
-   * 
-   * @param {PaymentAccountFormField.FieldId} fieldId - id of the field to set the value of
-   * @param {string} value - field value to set
-   * @param {PaymentAccountForm} form - form to get the field from
-   * @return {string} the form field value
-   */
-  static setFormValue(fieldId: PaymentAccountFormField.FieldId, value: string, form: PaymentAccountForm): void {
-    for (const field of form.getFieldsList()) {
-      if (field.getId() === fieldId) {
-        field.setValue(value);
-        return;
-      }
-    }
-    throw new Error("PaymentAccountForm does not have field " + fieldId);
-  }
-
   /**
    * Wait for the duration.
    * 
@@ -172,4 +125,80 @@ export default class HavenoUtils {
     const remainder: bigint = amountAtomicUnits as bigint % HavenoUtils.AU_PER_XMR;
     return Number(quotient) + Number(remainder) / Number(HavenoUtils.AU_PER_XMR);
   }
+
+  // ------------------------- PAYMENT ACCOUNT FORMS --------------------------
+
+  /**
+   * Get a validated payment method id from a string or form id.
+   * 
+   * @param {string |  PaymentAccountForm.FormId} id - identifies the payment method
+   * @returns {string} the payment method id
+   */
+  static getPaymentMethodId(id: string | PaymentAccountForm.FormId) {
+    if (typeof id === "string") {
+      id = id.toUpperCase();
+      if (!(id in PaymentAccountForm.FormId)) throw Error("Invalid payment method: " + id);
+      return id;
+    } else {
+      let keyByValue = getKeyByValue(PaymentAccountForm.FormId, id);
+      if (!keyByValue) throw Error("No payment method id with form id " + id);
+      return keyByValue;
+    }
+  }
+
+  /**
+   * Stringify a payment account form.
+   * 
+   * @param form - form to stringify
+   * @return {string} the stringified form
+   */
+  static formToString(form: PaymentAccountForm): string {
+    let str = "";
+    for (const field of form.getFieldsList()) {
+      str += field.getId() + ": " + this.getFormValue(form, field.getId()) + "\n";
+    }
+    return str.trim();
+  }
+  
+  /**
+   * Get a form field value.
+   * 
+   * @param {PaymentAccountForm} form - form to get the field value from
+   * @param {PaymentAccountFormField.FieldId} fieldId - id of the field to get the value from
+   * @return {string} the form field value
+   */
+  // TODO: attach getter and setter to PaymentAccountForm prototype in typescript?
+  static getFormValue(form: PaymentAccountForm, fieldId: PaymentAccountFormField.FieldId): string {
+    for (const field of form.getFieldsList()) {
+      if (field.getId() === fieldId) return field.getValue();
+    }
+    throw new Error("PaymentAccountForm does not have field " + fieldId);
+  }
+  
+  /**
+   * Set a form field value.
+   * 
+   * @param {PaymentAccountFormField.FieldId} fieldId - id of the field to set the value of
+   * @param {string} value - field value to set
+   * @param {PaymentAccountForm} form - form to get the field from
+   * @return {string} the form field value
+   */
+  static setFormValue(fieldId: PaymentAccountFormField.FieldId, value: string, form: PaymentAccountForm): void {
+    for (const field of form.getFieldsList()) {
+      if (field.getId() === fieldId) {
+        field.setValue(value);
+        return;
+      }
+    }
+    throw new Error("PaymentAccountForm does not have field " + fieldId);
+  }
+}
+
+function getKeyByValue(object: any, value: number): string | undefined {
+  for (const key in object) {
+      if (object.hasOwnProperty(key) && object[key] === value) {
+          return key;
+      }
+  }
+  return undefined;
 }